pub struct ObservableCounter<T>(/* private fields */);
Expand description

An async instrument that records increasing values.

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impl<T> ObservableCounter<T>

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pub fn new(inner: Arc<dyn AsyncInstrument<T>>) -> Self

Create a new observable counter.

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impl<T> ObservableCounter<T>

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pub fn observe(&self, value: T, attributes: &[KeyValue])

Records an increment to the counter.

It is only valid to call this within a callback. If called outside of the registered callback it should have no effect on the instrument, and an error will be reported via the error handler.

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pub fn as_any(&self) -> Arc<dyn Any>

Used for SDKs to downcast instruments in callbacks.

Trait Implementations§

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impl<T> AsyncInstrument<T> for ObservableCounter<T>

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fn observe(&self, measurement: T, attributes: &[KeyValue])

Observes the state of the instrument. Read more
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fn as_any(&self) -> Arc<dyn Any>

Used for SDKs to downcast instruments in callbacks.
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impl<T: Clone> Clone for ObservableCounter<T>

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fn clone(&self) -> ObservableCounter<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T> Debug for ObservableCounter<T>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl TryFrom<AsyncInstrumentBuilder<'_, ObservableCounter<f64>, f64>> for ObservableCounter<f64>

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type Error = MetricsError

The type returned in the event of a conversion error.
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fn try_from( builder: AsyncInstrumentBuilder<'_, ObservableCounter<f64>, f64> ) -> Result<Self, Self::Error>

Performs the conversion.
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impl TryFrom<AsyncInstrumentBuilder<'_, ObservableCounter<u64>, u64>> for ObservableCounter<u64>

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type Error = MetricsError

The type returned in the event of a conversion error.
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fn try_from( builder: AsyncInstrumentBuilder<'_, ObservableCounter<u64>, u64> ) -> Result<Self, Self::Error>

Performs the conversion.

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FutureExt for T

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fn with_context(self, otel_cx: Context) -> WithContext<Self>

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
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fn with_current_context(self) -> WithContext<Self>

Attaches the current Context to this type, returning a WithContext wrapper. Read more
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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.